blob: c4fe8f027932a90c70237f037d78b65e9d5fb603 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/*****************************************************************************/
// Copyright 2006-2007 Adobe Systems Incorporated
// All Rights Reserved.
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in
// accordance with the terms of the Adobe license agreement accompanying it.
/*****************************************************************************/
/* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_xy_coord.cpp#1 $ */
/* $DateTime: 2012/05/30 13:28:51 $ */
/* $Change: 832332 $ */
/* $Author: tknoll $ */
/*****************************************************************************/
#include "dng_xy_coord.h"
#include "dng_matrix.h"
#include "dng_utils.h"
/******************************************************************************/
dng_xy_coord XYZtoXY (const dng_vector_3 &coord)
{
real64 X = coord [0];
real64 Y = coord [1];
real64 Z = coord [2];
real64 total = X + Y + Z;
if (total > 0.0)
{
return dng_xy_coord (X / total,
Y / total);
}
return D50_xy_coord ();
}
/*****************************************************************************/
dng_vector_3 XYtoXYZ (const dng_xy_coord &coord)
{
dng_xy_coord temp = coord;
// Restrict xy coord to someplace inside the range of real xy coordinates.
// This prevents math from doing strange things when users specify
// extreme temperature/tint coordinates.
temp.x = Pin_real64 (0.000001, temp.x, 0.999999);
temp.y = Pin_real64 (0.000001, temp.y, 0.999999);
if (temp.x + temp.y > 0.999999)
{
real64 scale = 0.999999 / (temp.x + temp.y);
temp.x *= scale;
temp.y *= scale;
}
return dng_vector_3 (temp.x / temp.y,
1.0,
(1.0 - temp.x - temp.y) / temp.y);
}
/*****************************************************************************/
dng_xy_coord PCStoXY ()
{
return D50_xy_coord ();
}
/*****************************************************************************/
dng_vector_3 PCStoXYZ ()
{
return XYtoXYZ (PCStoXY ());
}
/*****************************************************************************/
|
